CN113249658A - High-speed steel vertical roll ring and preparation method thereof - Google Patents
High-speed steel vertical roll ring and preparation method thereof Download PDFInfo
- Publication number
- CN113249658A CN113249658A CN202110761727.1A CN202110761727A CN113249658A CN 113249658 A CN113249658 A CN 113249658A CN 202110761727 A CN202110761727 A CN 202110761727A CN 113249658 A CN113249658 A CN 113249658A
- Authority
- CN
- China
- Prior art keywords
- rolling
- roll collar
- transmission
- roll
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Abstract
The invention discloses a high-speed steel vertical roll ring and a preparation method thereof, wherein the preparation method comprises the following steps: the rolling device comprises a rolling roll ring and a transmission roll ring, wherein the rolling roll ring is sleeved outside the transmission roll ring, and the rolling roll ring comprises the following chemical components in percentage: 1.2-1.6% of C, 1.0-1.5% of Si, 0.3-0.8% of Mn, 3.5-4.0% of Cr, 4.5-5.0% of Mo, 1.5-2.0% of V, 4.5-5.0% of W, 1.5-2.0% of Co, and the balance of Fe and inevitable impurities, wherein the rolling roll ring is high-speed steel; the transmission roll collar comprises the following chemical components in percentage by weight: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities, and the transmission roll collar is high-toughness ferritic nodular cast iron. According to the invention, by designing reasonable components of the rolling roll collar and the transmission roll collar, the surface hardness of the roll can reach 80-90HSD, the impact toughness is higher, the service life is prolonged, the situation that the surface of the roll is blocky to fall off is avoided, and meanwhile, the once steel passing amount of a single groove is increased by more than 3 times compared with that of a common roll.
Description
Technical Field
The invention belongs to the technical field of rollers, and particularly relates to a high-speed steel vertical roller ring and a preparation method thereof.
Background
In the domestic high-speed rail rolling line, a rail is rolled by adopting a high-speed rail finish rolling universal rack vertical roll collar, the existing vertical roll collar is usually made of a semi-steel centrifugal material, the rolled steel passing amount is kept about 4000 tons, the surface abrasion of the roll collar is large, the quality of a rolled rail surface product is poor, and the steel passing amount is small.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides the high-speed steel vertical roll collar which has the advantages of high wear resistance and excessive steel.
According to the embodiment of the invention, the high-speed steel vertical roll ring comprises: the rolling device comprises a rolling roll collar and a transmission roll collar, wherein the rolling roll collar is sleeved outside the transmission roll collar, and the rolling roll collar comprises the following chemical components in percentage: 1.2-1.6% of C, 1.0-1.5% of Si, 0.3-0.8% of Mn, 3.5-4.0% of Cr, 4.5-5.0% of Mo, 1.5-2.0% of V, 4.5-5.0% of W, 1.5-2.0% of Co, and the balance of Fe and inevitable impurities, wherein the rolling roll ring is high-speed steel; the transmission roll collar comprises the following chemical components in percentage by weight: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities, wherein the transmission roll collar is high-toughness ferritic nodular cast iron.
According to one embodiment of the invention, the preparation method of the high-speed steel vertical roll collar comprises the following steps: the method comprises the following steps: preparing a rolling roll collar by adopting a centrifugal casting method; step two: preparing a transmission roll collar by adopting a static casting method; step three: performing finish machining on the assembly surfaces of the rolling roll collar and the transmission roll collar, and then assembling the rolling roll collar on the transmission roll collar in an interference manner to form a roll collar blank; step four: and processing the roll collar blank into a finished product.
According to an embodiment of the present invention, the first step includes the following steps: s10, smelting: adding a certain proportion of scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace, smelting to obtain rolling molten steel, heating the rolling molten steel to 1600-1650 ℃, and preserving heat for 10 minutes; s11, treatment outside the furnace: discharging when the temperature of the rolling molten steel is reduced to 1520-0 ℃, adding 1-2Kg/T ferrovanadium and 2-4Kg/T steel modifier along with the flow for inoculation and modification treatment, stirring for 1 minute, and then cleaning and deslagging; s12, centrifugal casting: when the temperature of the rolling molten steel is reduced to 1430-1470 ℃, 2-3Kg of anti-oxidation protective slag is put on the liquid level, then the rolling molten steel is rapidly poured into a centrifugal casting mold rotating at high speed, and then the anti-oxidation protective slag is put into two ends of the centrifugal casting mold again; s13, soft annealing treatment: carrying out soft annealing treatment on the rolled roller ring after centrifugal casting within the temperature range of 780-850 ℃; s14, processing and forming: reserving 3-5mm of machining allowance according to the finished drawing for machining; s15, heat treatment modification treatment: and carrying out high-temperature quenching and multiple tempering on the rolling roll collar to ensure that the surface hardness of the rolling roll collar reaches 80-90 HSD.
According to one embodiment of the invention, the chemical components and weight percentages of the rolled molten steel before tapping are as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities.
According to an embodiment of the present invention, in S12, the anti-oxidation mold flux at both ends of the centrifugal casting mold has a thickness of 3 to 4mm, the anti-oxidation mold flux is glass slag, and the anti-oxidation mold flux is melted to cover the surface of the rolled molten steel after being put into the centrifugal casting mold.
According to an embodiment of the present invention, the second step includes the following steps: s20, smelting II: adding pig iron, scrap steel and ferromanganese in a certain proportion into the intermediate frequency furnace and smelting to obtain transmission molten iron, and preparing to discharge the molten iron when the temperature of the molten iron to be transmitted is raised to 1400-1420 ℃; s21, spheroidizing inoculation: removing the material slag after the transmission molten iron is discharged out of the furnace, and placing the transmission molten iron in a wire feeding spheroidization inoculation station for spheroidization inoculation; s22, static casting: when the temperature of the molten iron to be transmitted is reduced to 1300-1320 ℃, the molten iron is poured into a prepared casting mold, and after cooling, the casting mold is opened to be processed into a transmission roll collar.
According to one embodiment of the invention, the chemical components and weight percentages before the molten iron is discharged from the furnace are as follows: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
According to an embodiment of the invention, during the interference assembly in the third step, the assembly surfaces of the rolling roller ring and the transmission roller ring are firstly subjected to finish machining, then the whole rolling roller ring is heated to the temperature of 250-300 ℃, then the rolling roller ring is assembled on the transmission roller ring at normal temperature, and the roller ring blank is formed after cooling.
According to one embodiment of the invention, the interference of the interference fit in the third step is 0.06-0.12%.
According to one embodiment of the invention, in the fourth step, the 3-5mm machining allowance of the surface of the roll collar blank is removed to form the high-speed steel vertical roll collar.
The invention has the beneficial effects that by designing the reasonable components of the rolling roller ring and the transmission roller ring, the rolling roller ring and the transmission roller ring are respectively cast in a centrifugal casting mode and a static casting mode, and form a whole in an interference assembly mode, so that the surface hardness of the roller can reach 80-90HSD, and the wear resistance and the steel passing amount are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic partial cross-sectional structural view of a high speed steel vertical roll collar according to an embodiment of the invention;
reference numerals:
a rolling roll collar 1 and a transmission roll collar 2.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The high speed steel vertical roll collar of an embodiment of the present invention is described in detail below.
According to the embodiment of the invention, the high-speed steel vertical roll collar comprises a rolling roll collar 1 and a transmission roll collar 2, wherein the rolling roll collar 1 is sleeved outside the transmission roll collar 2, and the rolling roll collar 1 comprises the following chemical components in percentage by weight: 1.2-1.6% of C, 1.0-1.5% of Si, 0.3-0.8% of Mn, 3.5-4.0% of Cr, 4.5-5.0% of Mo, 1.5-2.0% of V, 4.5-5.0% of W, 1.5-2.0% of Co, and the balance of Fe and inevitable impurities, wherein the rolling roll ring 1 is high-speed steel; the transmission roll collar 2 comprises the following chemical components in percentage by weight: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities, wherein the transmission roll collar 2 is high-toughness ferritic nodular cast iron.
A preparation method of a high-speed steel vertical roll collar comprises the following steps: the method comprises the following steps: preparing a rolling roll collar 1 by adopting a centrifugal casting method; step two: preparing a transmission roll collar 2 by adopting a static casting method; step three: performing finish machining on the assembly surfaces of the rolling roll collar 1 and the transmission roll collar 2, and then assembling the rolling roll collar 1 on the transmission roll collar 2 in an interference manner to form a roll collar blank; step four: and processing the roll collar blank into a finished product.
According to an embodiment of the present invention, the first step includes the following steps: s10, smelting: adding a certain proportion of scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace, smelting to obtain rolling molten steel, heating the rolling molten steel to 1600-1650 ℃, and preserving heat for 10 minutes; s11, treatment outside the furnace: discharging when the temperature of the rolling molten steel is reduced to 1520-0 ℃, adding 1-2Kg/T ferrovanadium and 2-4Kg/T steel modifier along with the flow for inoculation and modification treatment, stirring for 1 minute, and then cleaning and deslagging; s12, centrifugal casting: when the temperature of the rolling molten steel is reduced to 1430-1470 ℃, 2-3Kg of anti-oxidation protective slag is put on the liquid level, then the rolling molten steel is rapidly poured into a centrifugal casting mold rotating at a high speed, and then the anti-oxidation protective slag is put into two ends of the centrifugal casting mold again, so that the thickness of the anti-oxidation protective slag at the two ends of the centrifugal casting mold is 3-4mm, the anti-oxidation protective slag is glass slag, and the anti-oxidation protective slag is formed into a molten state to cover the surface of the rolling molten steel after being put into the centrifugal casting mold; s13, soft annealing treatment: carrying out soft annealing treatment on the rolling roller ring 1 after centrifugal casting within the temperature range of 780-850 ℃; s14, processing and forming: reserving 3-5mm of machining allowance according to the finished drawing for machining; s15, heat treatment modification treatment: and carrying out high-temperature quenching and multiple tempering on the rolling roller ring 1 to ensure that the surface hardness of the rolling roller ring 1 reaches 80-90 HSD. Set up anti-oxidation covering slag, avoid the rolling molten steel oxidation of surface on the one hand, prevent that oxygen from getting into the rolling molten steel and causing the hole defect, on the other hand makes the rolling molten steel surface even when centrifugal casting, avoids the oxide layer to influence surface local hardness, and the surface produces cubic when avoiding rolling and drops, and anti-oxidation covering slag makes the cooling when rolling collars 1 cools down even, has guaranteed that heat transfer is even, and then makes the thickness after the cooling even.
According to one embodiment of the invention, the chemical components and weight percentages of the rolled molten steel before tapping are as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities.
According to an embodiment of the present invention, the second step includes the following steps: s20, smelting II: adding pig iron, scrap steel and ferromanganese in a certain proportion into the intermediate frequency furnace and smelting to obtain transmission molten iron, and preparing to discharge the molten iron when the temperature of the molten iron to be transmitted is raised to 1400-1420 ℃; s21, spheroidizing inoculation: removing the material slag after the transmission molten iron is discharged out of the furnace, and placing the transmission molten iron in a wire feeding spheroidization inoculation station for spheroidization inoculation; s22, static casting: when the temperature of the molten iron to be transmitted is reduced to 1300-1320 ℃, the molten iron is poured into a prepared casting mold, and after cooling, the casting mold is opened to be processed into the transmission roller ring 2.
According to one embodiment of the invention, the chemical components and weight percentages before the molten iron is discharged from the furnace are as follows: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
According to an embodiment of the invention, during the interference assembly in the third step, the assembly surfaces of the rolling roller ring 1 and the transmission roller ring 2 are firstly subjected to finish machining, then the whole rolling roller ring 1 is heated to 250-300 ℃, then assembled on the transmission roller ring 2 at normal temperature, and cooled to form a roller ring blank. Further, the interference magnitude of the interference fit in the third step is 0.06-0.12%. The mode of interference heat assembly can ensure that the rolling roll collar 1 and the transmission roll collar 2 are firmly connected after assembly, and the proper interference magnitude is set, so that the rolling roll collar 1 and the transmission roll collar 2 can not be subjected to overlarge assembly stress while the connection is firm, and further the high-speed vertical roll collar is kept in a good state during rolling.
According to one embodiment of the invention, in the fourth step, the 3-5mm machining allowance of the surface of the roll collar blank is removed to form the high-speed steel vertical roll collar. And after assembly, the integral machining allowance is removed, so that the consistency of the roll collar is improved.
Example 1
Preparing 1 550/305X 220mm hot-rolled 200X 100H-shaped steel vertical roll collar, wherein the target content of the roll collar 1 is as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities. The transmission roll collar 2 is obtained by integrally and statically casting high-toughness ferrite nodular cast iron, and the transmission roll collar 2 comprises the following chemical components in percentage by weight of 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
1) Smelting: adding scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace in a certain proportion, so that the chemical components and the weight percentage of the rolling molten steel reach the component requirements before discharging: 1.4% of C, 1.1% of Si, 0.35% of Mn, 0.023% of P, 0.013% of S, 3.8% of Cr, 4.72% of Mo, 1.71% of V, 4.78% of W, 1.52% of Co and the balance of Fe and inevitable impurities, heating to 1620 ℃, and preserving heat for 10 minutes;
2) centrifugal casting: when the temperature of rolling molten steel is reduced to 1465 ℃, after slag is rapidly removed, 3Kg of anti-oxidation protective slag is put into the liquid level of the molten iron, the molten iron is rapidly poured into a centrifugal casting mold rotating at a high speed, and the anti-oxidation protective slag is put into two ends of the centrifugal casting mold again, so that the thickness of the anti-oxidation protective slag at the two ends of the centrifugal casting mold is 3 mm;
3) soft annealing treatment: carrying out 780 ℃ soft annealing treatment on the rolling roll collar 1 cast by centrifugal casting, eliminating casting stress and improving the processing performance;
4) and (3) processing and forming: reserving 5mm allowance of a processing drawing according to a finished drawing for processing;
5) quenching and multiple tempering modification treatment;
6) casting and processing the transmission roll collar 2;
7) heating the rolling roll collar 1 to 250 ℃, wherein the assembly interference is 0.065%, and pressing the rolling roll collar into the formed transmission roll collar 2;
8) and (5) processing and removing the reserved allowance of 5 mm.
Example 2
Preparing 1 460/280X 180mm hot-rolled 150X 100H-shaped steel vertical roll collar, wherein the target content of the roll collar 1 is as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities. The transmission roll collar 2 is obtained by integrally and statically casting high-toughness ferrite nodular cast iron, and the transmission roll collar 2 comprises the following chemical components in percentage by weight of 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
1) Smelting: adding scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace in a certain proportion, so that the chemical components and the weight percentage of the rolling molten steel reach the component requirements before discharging: 1.55% of C, 1.11% of Si, 0.44% of Mn, 0.021% of P, 0.011% of S, 3.65% of Cr, 4.62% of Mo, 1.68% of V, 4.55% of W, 1.76% of Co and the balance of Fe and inevitable impurities, heating to 1650 ℃, and preserving heat for 10 minutes;
2) centrifugal casting: when the temperature of rolling molten steel is reduced to 1470 ℃, after slag is rapidly removed, 2Kg of anti-oxidation protective slag is put into the liquid level of the molten iron, the molten iron is rapidly poured into a centrifugal casting mold rotating at a high speed, and the anti-oxidation protective slag is put into two ends of the centrifugal casting mold again, so that the thickness of the anti-oxidation protective slag at the two ends of the centrifugal casting mold is 3 mm;
3) soft annealing treatment: carrying out soft annealing treatment at 800 ℃ on the rolling roll collar 1 cast by centrifugal casting, eliminating casting stress and improving the processing performance;
4) and (3) processing and forming: reserving 5mm allowance of a processing drawing according to a finished drawing for processing;
5) quenching and multiple tempering modification treatment;
6) casting and processing the transmission roll collar 2;
7) heating the rolling roller ring 1 to 280 ℃, and pressing the rolling roller ring into the formed transmission roller ring 2, wherein the assembly interference is 0.075%;
8) and (5) processing and removing the reserved allowance of 5 mm.
Example 3
Preparing 1 roll collar of 800/476 multiplied by 342mm hot rolled rail section steel, wherein the target content of the roll collar 1 is as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities. The transmission roll collar 2 is obtained by integrally and statically casting high-toughness ferrite nodular cast iron, and the transmission roll collar 2 comprises the following chemical components in percentage by weight of 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
1) Smelting: adding scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace in a certain proportion, so that the chemical components and the weight percentage of the rolling molten steel reach the component requirements before discharging: 1.55% of C, 1.32% of Si, 0.48% of Mn, 0.02% of P, 0.015% of S, 3.88% of Cr, 4.8% of Mo, 1.88% of V, 4.71% of W, 1.56% of Co and the balance of Fe and inevitable impurities, heating to 1650 ℃, and preserving the temperature for 10 minutes.
2) Centrifugal casting: when the temperature of rolling molten steel is reduced to 1435 ℃, after slag is rapidly removed, 3Kg of anti-oxidation protective slag is put in the liquid level of the molten iron, the molten iron is rapidly poured into a centrifugal casting mold rotating at a high speed, and the anti-oxidation protective slag is put in two ends of the centrifugal casting mold again, so that the thickness of the anti-oxidation protective slag at the two ends of the centrifugal casting mold is 3 mm;
3) soft annealing treatment: carrying out 850 ℃ soft annealing treatment on the rolling roll collar 1 cast by centrifugal casting, eliminating casting stress and improving the processing performance;
4) and (3) processing and forming: reserving 5mm allowance of a processing drawing according to a finished drawing for processing;
5) quenching and multiple tempering modification treatment;
6) casting and processing the transmission roll collar 2;
7) heating the rolling roller ring 1 to 280 ℃, and pressing the rolling roller ring 1 into the formed transmission roller ring 2, wherein the assembly interference is 0.09%;
8) and (5) processing and removing the reserved allowance of 5 mm.
The three rolls prepared in examples 1 to 3 were subjected to the tests of tensile strength, hardness, impact toughness and single pass through steel amount of the single pass, and the test results are as follows:
| serial number | Tensile strength Mpa | Hard HSC | Impact toughness J | Single slot once steel passing amount (times) |
| Example 1 | 720 | 86 | 6.70 | 3.2 |
| Example 2 | 760 | 83 | 7.3 | 3.5 |
| Example 3 | 750 | 83 | 8.1 | 3.8 |
The comparison of the above table shows that by designing the reasonable components of the rolling roll collar 1 and the transmission roll collar 2, the centrifugal casting and static casting modes are respectively adopted for the rolling roll collar 1 and the transmission roll collar 2, and the rolling roll collar and the transmission roll collar are integrally formed in an interference assembly mode, so that the surface hardness of the roll can reach 80-90HSD, the impact toughness is high, the service life is prolonged, the situation that the surface of the roll is blocky to fall off is avoided, and meanwhile, the steel passing amount of a single groove at one time is increased by more than 3 times compared with that of a common roll.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A high speed steel vertical roll collar, comprising: the rolling device comprises a rolling roll ring (1) and a transmission roll ring (2), wherein the rolling roll ring (1) is sleeved outside the transmission roll ring (2), and the rolling roll ring (1) comprises the following chemical components in percentage: 1.2-1.6% of C, 1.0-1.5% of Si, 0.3-0.8% of Mn, 3.5-4.0% of Cr, 4.5-5.0% of Mo, 1.5-2.0% of V, 4.5-5.0% of W, 1.5-2.0% of Co, and the balance of Fe and inevitable impurities, wherein the rolling roll ring (1) is high-speed steel; the transmission roll collar (2) comprises the following chemical components in percentage by weight: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities, wherein the transmission roll collar (2) is high-toughness ferritic nodular cast iron.
2. The method for preparing the high-speed steel vertical roller ring according to claim 1, which is characterized by comprising the following steps of:
the method comprises the following steps: preparing a rolling roll collar (1) by adopting a centrifugal casting method;
step two: preparing a transmission roll collar (2) by adopting a static casting method;
step three: performing finish machining on the assembly surfaces of the rolling roll collar (1) and the transmission roll collar (2), and then assembling the rolling roll collar (1) on the transmission roll collar (2) in an interference manner to form a roll collar blank;
step four: and processing the roll collar blank into a finished product.
3. The method for preparing the high-speed steel vertical roller ring according to claim 2, wherein the first step comprises the following steps:
s10, smelting: adding a certain proportion of scrap steel, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten and ferrocobalt into the intermediate frequency furnace, smelting to obtain rolling molten steel, heating the rolling molten steel to 1600-1650 ℃, and preserving heat for 10 minutes;
s11, treatment outside the furnace: discharging when the temperature of the rolling molten steel is reduced to 1520-0 ℃, adding 1-2Kg/T ferrovanadium and 2-4Kg/T steel modifier along with the flow for inoculation and modification treatment, stirring for 1 minute, and then cleaning and deslagging;
s12, centrifugal casting: when the temperature of the rolling molten steel is reduced to 1430-1470 ℃, 2-3Kg of anti-oxidation protective slag is put on the liquid level, then the rolling molten steel is rapidly poured into a centrifugal casting mold rotating at high speed, and then the anti-oxidation protective slag is put into two ends of the centrifugal casting mold again;
s13, soft annealing treatment: carrying out soft annealing treatment on the rolling roller ring (1) after centrifugal casting within the temperature range of 780-850 ℃;
s14, processing and forming: reserving 3-5mm of machining allowance according to the finished drawing for machining;
s15, heat treatment modification treatment: and (3) carrying out high-temperature quenching and multiple tempering on the rolling roller ring (1) to ensure that the surface hardness of the rolling roller ring (1) reaches 80-90 HSD.
4. The method for preparing the high-speed steel vertical roll collar as claimed in claim 3, wherein the chemical components and weight percentages of the rolled molten steel before being discharged from the furnace are as follows: 1.2 to 1.6 percent of C, 1.0 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, 3.5 to 4.0 percent of Cr, 4.5 to 5.0 percent of Mo, 1.5 to 2.0 percent of V, 4.5 to 5.0 percent of W, 1.5 to 2.0 percent of Co, and the balance of Fe and inevitable impurities.
5. The method for manufacturing a high-speed steel vertical roller ring according to claim 3, wherein in step S12, the anti-oxidation mold flux at both ends of the centrifugal casting mold has a thickness of 3-4mm, the anti-oxidation mold flux is glass slag, and the anti-oxidation mold flux is melted and covers the surface of the rolled molten steel.
6. The method for preparing the high-speed steel vertical roller ring according to claim 2, wherein the second step comprises the following steps:
s20, smelting II: adding pig iron, scrap steel and ferromanganese in a certain proportion into the intermediate frequency furnace and smelting to obtain transmission molten iron, and preparing to discharge the molten iron when the temperature of the molten iron to be transmitted is raised to 1400-1420 ℃;
s21, spheroidizing inoculation: removing the material slag after the transmission molten iron is discharged out of the furnace, and placing the transmission molten iron in a wire feeding spheroidization inoculation station for spheroidization inoculation;
s22, static casting: when the temperature of the molten iron to be transmitted is reduced to 1300-1320 ℃, the molten iron is poured into a prepared casting mold, and after cooling, the casting mold is opened to be processed into the transmission roller ring (2).
7. The method for preparing the high-speed steel vertical roll collar according to claim 6, wherein the chemical components and weight percentages before discharging the transmission molten iron are as follows: 2.7-3.0% of C, 2.5-3.0% of Si, 0.3-0.8% of Mn, 0.04-0.1% of Mg, and the balance of Fe and inevitable impurities.
8. The method for preparing the high-speed steel vertical roll collar as claimed in claim 2, wherein in the step three, during the interference assembly, the assembling surfaces of the rolling roll collar (1) and the transmission roll collar (2) are firstly subjected to finish machining, then the rolling roll collar (1) is integrally heated to 250-300 ℃, then assembled on the transmission roll collar (2) at normal temperature, and cooled to form a roll collar blank.
9. The method for preparing the high-speed steel vertical roller ring according to claim 8, wherein the interference fit in the third step is 0.06-0.12%.
10. The method for preparing the high-speed steel vertical roll collar according to claim 2, wherein 3-5mm of machining allowance of the surface of the roll collar blank is removed in the fourth step to form the high-speed steel vertical roll collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761727.1A CN113249658B (en) | 2021-07-06 | 2021-07-06 | High-speed steel vertical roll ring and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761727.1A CN113249658B (en) | 2021-07-06 | 2021-07-06 | High-speed steel vertical roll ring and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113249658A true CN113249658A (en) | 2021-08-13 |
| CN113249658B CN113249658B (en) | 2021-09-24 |
Family
ID=77190745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110761727.1A Active CN113249658B (en) | 2021-07-06 | 2021-07-06 | High-speed steel vertical roll ring and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113249658B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959507A (en) * | 2022-07-27 | 2022-08-30 | 江苏凯达重工股份有限公司 | Tungsten-vanadium alloy tool steel roll collar and preparation method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051352A (en) * | 1991-06-24 | 1993-01-08 | Kubota Corp | Composite roll and its manufacture |
| AU4075695A (en) * | 1995-02-14 | 1996-08-22 | Kawasaki Steel Corporation | Roll outer layer material for hot rolling and method of manufacturing roll for hot rolling |
| JPH10195598A (en) * | 1997-01-09 | 1998-07-28 | Nippon Steel Corp | Rolling roll material and roll for hot rolling |
| JPH1171628A (en) * | 1997-06-27 | 1999-03-16 | Mitsubishi Materials Corp | Composite rolling roll excellent in thermal shock resistance |
| US6110084A (en) * | 1997-06-27 | 2000-08-29 | Mitsubishi Materials Corporation | Combined roll having excellent resistance to thermal shock |
| JP2001294975A (en) * | 2000-04-12 | 2001-10-26 | Nippon Steel Corp | Composite roll for rolling treatment |
| JP2006089823A (en) * | 2004-09-27 | 2006-04-06 | Nachi Fujikoshi Corp | Die made of high-speed tool steel |
| CN102936681A (en) * | 2012-11-19 | 2013-02-20 | 湖州市银鑫轧辊有限公司 | Method for manufacturing rollers by using high-speed steel |
| CN103757517A (en) * | 2013-12-27 | 2014-04-30 | 宁夏共享集团有限责任公司 | Production method of as-cast ferritic matrix nodular cast iron QT500-14 |
| CN105579156A (en) * | 2013-09-25 | 2016-05-11 | 日立金属株式会社 | Centrifugally cast composite roll for hot rolling |
| CN106086705A (en) * | 2016-08-17 | 2016-11-09 | 三鑫重工机械有限公司 | A kind of high-speed steel roll of graphitiferous |
| CN107475641A (en) * | 2017-08-14 | 2017-12-15 | 湖南长高新材料股份有限公司 | High-speed steel roll and preparation method thereof |
| US20180257134A1 (en) * | 2016-05-27 | 2018-09-13 | Shandong Province Sifang Technical Development Co., Ltd | Composite casting special-shaped roll and preparation process therefore |
| CN109070160A (en) * | 2016-03-31 | 2018-12-21 | 日立金属株式会社 | Roll outer layer and rolling composite roll |
| CN111945053A (en) * | 2020-07-13 | 2020-11-17 | 安徽环渤湾高速钢轧辊有限公司 | Method for preparing high-speed steel roller by composite modification treatment |
-
2021
- 2021-07-06 CN CN202110761727.1A patent/CN113249658B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051352A (en) * | 1991-06-24 | 1993-01-08 | Kubota Corp | Composite roll and its manufacture |
| AU4075695A (en) * | 1995-02-14 | 1996-08-22 | Kawasaki Steel Corporation | Roll outer layer material for hot rolling and method of manufacturing roll for hot rolling |
| JPH10195598A (en) * | 1997-01-09 | 1998-07-28 | Nippon Steel Corp | Rolling roll material and roll for hot rolling |
| JPH1171628A (en) * | 1997-06-27 | 1999-03-16 | Mitsubishi Materials Corp | Composite rolling roll excellent in thermal shock resistance |
| US6110084A (en) * | 1997-06-27 | 2000-08-29 | Mitsubishi Materials Corporation | Combined roll having excellent resistance to thermal shock |
| JP2001294975A (en) * | 2000-04-12 | 2001-10-26 | Nippon Steel Corp | Composite roll for rolling treatment |
| JP2006089823A (en) * | 2004-09-27 | 2006-04-06 | Nachi Fujikoshi Corp | Die made of high-speed tool steel |
| CN102936681A (en) * | 2012-11-19 | 2013-02-20 | 湖州市银鑫轧辊有限公司 | Method for manufacturing rollers by using high-speed steel |
| US20160193638A1 (en) * | 2013-09-25 | 2016-07-07 | Hitachi Metals, Ltd. | Centrifugally cast, hot-rolling composite roll |
| CN105579156A (en) * | 2013-09-25 | 2016-05-11 | 日立金属株式会社 | Centrifugally cast composite roll for hot rolling |
| CN103757517A (en) * | 2013-12-27 | 2014-04-30 | 宁夏共享集团有限责任公司 | Production method of as-cast ferritic matrix nodular cast iron QT500-14 |
| CN109070160A (en) * | 2016-03-31 | 2018-12-21 | 日立金属株式会社 | Roll outer layer and rolling composite roll |
| US20180257134A1 (en) * | 2016-05-27 | 2018-09-13 | Shandong Province Sifang Technical Development Co., Ltd | Composite casting special-shaped roll and preparation process therefore |
| CN106086705A (en) * | 2016-08-17 | 2016-11-09 | 三鑫重工机械有限公司 | A kind of high-speed steel roll of graphitiferous |
| CN107475641A (en) * | 2017-08-14 | 2017-12-15 | 湖南长高新材料股份有限公司 | High-speed steel roll and preparation method thereof |
| CN111945053A (en) * | 2020-07-13 | 2020-11-17 | 安徽环渤湾高速钢轧辊有限公司 | Method for preparing high-speed steel roller by composite modification treatment |
Non-Patent Citations (4)
| Title |
|---|
| HONGWEI QU等: "Precipitation rule of carbides in a new high speed steel for rollers", 《CALPHAD: COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY》 * |
| 王志成等: "离心铸造高速钢—球铁复合轧辊的制造工艺", 《球墨铸铁》 * |
| 符寒光等: "高速钢复合辊环离心铸造技术研究", 《钢铁》 * |
| 陈庆华: "高速钢辊环的研制及应用", 《宝钢技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959507A (en) * | 2022-07-27 | 2022-08-30 | 江苏凯达重工股份有限公司 | Tungsten-vanadium alloy tool steel roll collar and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113249658B (en) | 2021-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101695714B (en) | Cast steel back-up roller and preparation method thereof | |
| CN100404152C (en) | High speed steel composite roll and its preparing method | |
| CN101265547B (en) | High-chromium-manganese cast iron roller and preparation method thereof | |
| CN107904492A (en) | A kind of low silicon high-carbon-chromium bearing steel and its hot rolling production method | |
| CN108754068B (en) | High-speed steel roll collar for high-speed wire pre-finish rolling and preparation method thereof | |
| CN101225500A (en) | High-molybdenum high-vanadium microsegregation cast high speed steel for rolls | |
| CN113249658B (en) | High-speed steel vertical roll ring and preparation method thereof | |
| CN112662934A (en) | Method for reducing bearing steel 100Cr6 carbide banded structure | |
| CN104498828A (en) | Rolled steel solid wheel for railway wagons and wheel steel and production method thereof | |
| CN101864546A (en) | High heat-resistance abrasion-resistance alloy roller | |
| CN114346197B (en) | Preparation method of surface roughness-resistant roller for heavy and medium plate mill | |
| CN112322970A (en) | High-chromium steel composite roll collar and manufacturing method thereof | |
| CN108004458B (en) | Improved high-chromium iron roller for tungsten modification treatment | |
| CN112981233A (en) | Low-silicon medium-carbon gear steel suitable for cold forging processing and manufacturing method thereof | |
| JP2002220635A (en) | Single-layer sleeve roll for hot rolling made with centrifugal casting | |
| CN105369139B (en) | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material | |
| CN111101062A (en) | high-Nb high-speed steel roll for centrifugal composite casting with improved hot rolling and preparation method thereof | |
| CN116334483A (en) | Reducing roller collar based on steel tube rolling mill and manufacturing method thereof | |
| CN100554481C (en) | A kind of alloy ball iron guide disc for precision tube grimper | |
| JP2618309B2 (en) | Centrifugal casting sleeve roll and its manufacturing method | |
| JP2601746B2 (en) | Centrifugal casting sleeve roll and its manufacturing method | |
| CN114367649A (en) | Preparation method of high-speed steel working roll for hot rolling plate strip finish rolling | |
| CN112063914B (en) | Preparation method of white cast iron for roller and white cast iron | |
| CN113235001A (en) | High-speed casting roller sleeve with high heat transfer rate and high thermal fatigue resistance and processing method | |
| CN111778449A (en) | Improved ferrite square steel roughing roll and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.66, Dong'an Xingwang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province 213100 Patentee after: Jiangsu Kaida Heavy Industry Co.,Ltd. Address before: 213155 No. 66, Dong'an Xingwang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU KAIDA HEAVY INDUSTRY TECHNOLOGY CO.,LTD. |